Biblical character holds husband in restraint (5)
I believe the answer is:
chain
'restraint' is the definition.
(I know that chain is a type of restraint)
'biblical character holds husband' is the wordplay.
'biblical character' becomes 'cain' (I can't explain this - if you can you should believe this answer much more).
'holds' indicates putting letters inside.
'husband' becomes 'h' (abbreviation).
'cain' placed around 'h' is 'CHAIN'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for chain that I've seen before include "number of shops" , "A measure" , "Series of interconnecting links" , "Series of links; sixty six feet" , "series of shops" .)